Hello,
given a test request which specifies a random vibration profile as a PSD and after running a simulation to get a PSD stress, is it possible to simply carry out inverse fft of the responce (nm^2)^2/Hz to get the stress in the time domain (nm^2/s) and then carry out rainflow counting to...
Hello,
When calculating the number of cycles to failure during a random vibration test fatigue calculation based on minors cumulative damage, should you use the first resonant frequency, the frequency which has the larges mass participation or calculate the number of RMS zero crossing points...
Hi all,
Not sure if this is the best place for this post but here we go...
How do I account for a factor of safety with RMS stresses abtained from an random vibration FEA analysis using an acceleration Vs frequency PSD excitation input. Is it a simple case of doubling the RMS stress value for...
Hello fellow engineers,
I am doing some work for an automotive company and need to simulate one of their tests before i send the part of for pv testing, here is the test spec.
Test Spec
Half sin acceleration pulse.
Duration = 6ms (0.006s)
peak acceleration = 500ms^2
part to be orientated...
Hello all,
I wonder if anyone can help me with a simulation i am having problems with... here is the problem...
A flat disc with a central mass is subjected to a shock test. The disk is fixed to a rig which subjects it to a half sine acceleration pulse which lasts for 6ms (0.006s) with a peak...
